These 7 colours are Red, Orange,
Yellow, Blue, Green, Indigo, and Violet. An easy way to remember the
colours of the visible spectrum (the rainbow) is to think of a boys
name; ROY G BIV.
See the prism working above.When sunlight
enters a prism, it bends. This is called refraction. Then from
one beam of white sunlight, out the other side of prism comes all the
colours of the rainbow. This is called dispersion.
A raindrop is like a prism but with a
rounded bottom. So think of the rain as a sky full of prisms just
waiting for the chance to bend sunbeams!
A double rainbow appears Sunday
afternoon, May 25, over Bell Block during a shower of rain.
You see the ROY G BIV colours in the
picture above and when light passes through water sprayed from a